EP 1574737 A1 20050914 - Coupling device and improved method of controlling torque transmission
Title (en)
Coupling device and improved method of controlling torque transmission
Title (de)
Kupplungsandordnung und verbesserte Methode zur Steuerung des Übertragungsmoments
Title (fr)
Dispositif d'accouplement et méthode améliorée pour commander la transmission de couple
Publication
Application
Priority
US 79565104 A 20040308
Abstract (en)
A method of controlling a pressure control valve assembly (69) to control a control pressure (43,71) in a system (11) including a source (47,49) of pressurized fluid. The control valve assembly is operable to vary the control pressure in response to variations in an electrical input signal (87) to an electromagnetic coil (81). The control valve assembly defines an inlet (77) in communication with the control pressure, an outlet (93) in communication with the low pressure, and a valve seat (89) disposed intermediate the inlet (77) and the outlet (93). A poppet valve member (91) is biased toward the valve seat by a biasing means including an armature (95), the biasing force being generally proportional to the input signal to the coil. The method comprises the steps of selecting a predetermined, minimum pressure for the control pressure corresponding to a minimum condition of the system. Next is selecting the biasing means to apply a biasing force to the poppet valve (91) corresponding to a fluid pressure less than the predetermined minimum pressure for the control pressure. The last step is selecting the electrical input signal (87) to correspond to the desired control pressure, an increasing input signal resulting in an increasing biasing force on the poppet valve member (91), but with no substantial movement thereof. <IMAGE>
IPC 1-7
IPC 8 full level
F16D 25/08 (2006.01); F16D 43/284 (2006.01); F16D 48/02 (2006.01); F16H 48/30 (2006.01)
CPC (source: EP KR US)
F16D 43/284 (2013.01 - EP US); F16D 48/02 (2013.01 - EP US); F16H 48/08 (2013.01 - EP US); F16H 48/22 (2013.01 - EP US); F16H 48/30 (2013.01 - EP US); F16H 48/32 (2013.01 - KR); F16H 48/34 (2013.01 - EP US); F16D 2048/0221 (2013.01 - EP US); F16H 48/32 (2013.01 - EP US); F16H 2048/204 (2013.01 - EP US); F16H 2048/346 (2013.01 - EP US); F16H 2048/382 (2013.01 - EP US); F16H 2200/2071 (2013.01 - EP US); Y10T 137/7928 (2015.04 - EP US)
Citation (applicant)
- US 5964126 A 19991012 - OKCUOGLU MURAT N [US]
- US 5310388 A 19940510 - OKCUOGLU MURAT N [US], et al
- US 6464056 B1 20021015 - LOWELL JEFFREY [US], et al
Citation (search report)
- [X] DE 10318423 A1 20031106 - DANA CORP TOLEDO [US]
- [A] EP 0570841 A2 19931124 - IPUMATIC AB [SE]
- [A] WO 02079661 A1 20021010 - STEYR POWERTRAIN AG & CO KG [AT], et al
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 1574737 A1 20050914; CN 100567755 C 20091209; CN 1683803 A 20051019; JP 2005257079 A 20050922; JP 4670096 B2 20110413; KR 20060043498 A 20060515; US 2005194231 A1 20050908; US 7051857 B2 20060530
DOCDB simple family (application)
EP 05004946 A 20050307; CN 200510071737 A 20050308; JP 2005063812 A 20050308; KR 20050018998 A 20050308; US 79565104 A 20040308